安装SSH

 

如果提示没有SSH目录：bash: cd: /root/.ssh: 没有那个文件或目录

可以执行：ssh localhost

[centos02@centos02 ~]$ su root
密码：
[root@centos02 centos02]# pwd
/home/centos02
[root@centos02 centos02]# cd ~/
[root@centos02 ~]# pwd
/root
[root@centos02 ~]# cd ~/.ssh
bash: cd: /root/.ssh: 没有那个文件或目录
[root@centos02 software]# ssh localhost
The authenticity of host 'localhost (::1)' can't be established.
ECDSA key fingerprint is SHA256:P1L8h3CQufhYRfgBafwGjB18GugzL+XCi62o2x8cM0I.
ECDSA key fingerprint is MD5:c8:13:aa:73:1e:8b:1b:8e:e2:89:88:1e:b9:e7:7d:83.
Are you sure you want to continue connecting (yes/no)? 
Host key verification failed.
[root@centos02 ~]# cd ~/.ssh
[root@centos02 .ssh]# ll
总用量 0
[root@centos02 .ssh]# 

 

开始安装：SSH

[root@centos02 .ssh]# pwd
/root/.ssh
[root@centos02 .ssh]# ll
总用量 0
[root@centos02 .ssh]# 
[root@centos02 .ssh]# ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa): 
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /root/.ssh/id_rsa.
Your public key has been saved in /root/.ssh/id_rsa.pub.
The key fingerprint is:
SHA256:dLHJo+VVSUKK+zgDxmGM+H+APgMmgIpasAK5O8lT85g root@centos02
The key's randomart image is:
+---[RSA 2048]----+
|          ..o.o. |
|.. . o   o = o.  |
|* . . + o O .    |
|=+ . + o * o     |
|B +oo = S .      |
|+*.o=o o o       |
|=o E+.. = .      |
| ..  o . o       |
|                 |
+----[SHA256]-----+
[root@centos02 .ssh]# ll
总用量 8
-rw------- 1 root root 1679 5月  13 01:38 id_rsa
-rw-r--r-- 1 root root  395 5月  13 01:38 id_rsa.pub
[root@centos02 .ssh]# cat id_rsa.pub 
ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC8ZkocNCDf77IGVlaCV/IVJdHmY+tkySECAU7L2vXzIZnsqQEvf+xvKKV9X2bcPo4xSfwUSanc+kPSZpDJolysS3VMBMxk2dgfK1EJm62yGMdywiueQmY2JylTAGSSUAyJOG9kS5JzSSn81qZZdkY5zdDNeklu0utNB/oZWITQQDWgApnfo+y6NbNXFsFn7DTrI9hJfVrsYeCiso7e7BUAK5kSFoY/e4+EHKLN3KsL02WQQ8ZcTvRf4N4mHjELapRRlSUqxUeCO8HwIb7QHQgt/WVgmTBC6pIhtyfXDaV0TAwd5bvgVMVHFO6hPx7hMkQ124hYdfk3vgfmKzvdnnhl root@centos02
[root@centos02 .ssh]# 
[root@centos02 .ssh]# cat ./id_rsa.pub >> ./authorized_keys
[root@centos02 .ssh]# 
[root@centos02 .ssh]# ll
总用量 12
-rw-r--r-- 1 root root  395 5月  13 01:42 authorized_keys
-rw------- 1 root root 1679 5月  13 01:38 id_rsa
-rw-r--r-- 1 root root  395 5月  13 01:38 id_rsa.pub
[root@centos02 .ssh]# chmod 700 ~/.ssh
[root@centos02 .ssh]# chmod 700 ~/.ssh/authorized_keys
[root@centos02 .ssh]# ll
总用量 12
-rwx------ 1 root root  395 5月  13 01:42 authorized_keys
-rw------- 1 root root 1679 5月  13 01:38 id_rsa
-rw-r--r-- 1 root root  395 5月  13 01:38 id_rsa.pub
[root@centos02 .ssh]# cd ~/.ssh/authorized_keys
bash: cd: /root/.ssh/authorized_keys: 不是目录
[root@centos02 .ssh]# cat ~/.ssh/authorized_keys
ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC8ZkocNCDf77IGVlaCV/IVJdHmY+tkySECAU7L2vXzIZnsqQEvf+xvKKV9X2bcPo4xSfwUSanc+kPSZpDJolysS3VMBMxk2dgfK1EJm62yGMdywiueQmY2JylTAGSSUAyJOG9kS5JzSSn81qZZdkY5zdDNeklu0utNB/oZWITQQDWgApnfo+y6NbNXFsFn7DTrI9hJfVrsYeCiso7e7BUAK5kSFoY/e4+EHKLN3KsL02WQQ8ZcTvRf4N4mHjELapRRlSUqxUeCO8HwIb7QHQgt/WVgmTBC6pIhtyfXDaV0TAwd5bvgVMVHFO6hPx7hMkQ124hYdfk3vgfmKzvdnnhl root@centos02
[root@centos02 .ssh]#